A photo posted by actress Rebel Wilson has fans convinced that 'Pitch Perfect 4' is in the works

In an image posted to Twitter, actress Rebel Wilson hinted at the possibility of a "Pitch Perfect 4."

Fans previously believed that the third film would be the last.

There is no official word yet on the making of "Pitch Perfect 4."

Since its release in 2012, "Pitch Perfect" has become a phenomenon. The blockbuster film soared at the box office and launched two sequels: "Pitch Perfect 2" was released in 2015 and "Pitch Perfect 3" was released in 2017.

Fans thought they'd reached an end to the franchise after the 2017 film but now, an image posted by actress Rebel Wilson, who plays "Fat Amy" in the films, has fans thinking "Pitch Perfect 4" is in the works.

On Sunday, Wilson took to Twitter to share a picture with three cast members from "Pitch Perfect." In the image, captioned with four hearts, each actor is holding up four fingers.

Fans were quick to share their enthusiasm at the prospect of a fourth film.

Although there is no confirmation from Universal Pictures regarding the fourth film, Brittany Snow, who plays Chloe in the films, said just last week that she would be interested in doing another film.

She told Extra, "I think all of us would be game for it. We have the best time filming those movies. We made some of our best friends during that franchise... part of us knows that chapter might be closed and is okay with that, but we are still incredibly close and we will probably make them — if they want us to — until the end of time."

Before the third film was even released, singer Hailee Steinfeld also hinted at a fourth installment in an interview with Seventeen magazine. "Maybe. I don't know anything for sure, but I don't know it's entirely over for the Bellas," said Steinfeld.